build(docker/database): fix postgres FROM url

Makefile

@@ -214,7 +214,7 @@ database-%:
 .PHONY: --containerized-database
 --containerized-database: FRADRIVE_SERVICE=database
 # port forwarding is disabled in --network=host mode; nevertheless it is stated here for documentation reasons
---containerized-database: CONTAINER_PORTS=-p 127.0.0.1:5432:5432/tcp
+--containerized-database: CONTAINER_PORTS=-p 5432:5432/tcp
 --containerized-database: --image-build
 	if [ "$(IN_CONTAINER)" == "false" ] ; then \
 	  $(CONTAINER_COMMAND) run -it $(CONTAINER_PORTS) --name fradrive.$(FRADRIVE_SERVICE).$$(date +'%Y-%m-%dT%H-%M-%S') fradrive/$(FRADRIVE_SERVICE) ; \

config/settings.yml

@@ -123,7 +123,7 @@ auth-pw-hash:
 database:
   user:     "_env:PGUSER:uniworx"
   password: "_env:PGPASS:uniworx"
-  host:     "_env:PGHOST:127.0.0.1"
+  host:     "_env:PGHOST:host.docker.internal"
   port:     "_env:PGPORT:5432"
   # See config/test-settings.yml for an override during tests
   database: "_env:PGDATABASE:uniworx"

docker/database/Dockerfile

@@ -1,4 +1,4 @@
-FROM postgres:12
+FROM docker.io/postgres:12
 
 # Allow for connecting to database without password authentication
 ENV POSTGRES_HOST_AUTH_METHOD=trust